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Original question:

How to simulate a sample and hold circuit with the TINA-TI tool

About droop rate in sample hold circuit model

user5994067
Intellectual 820 points
Other Parts Discussed in Thread: TINA-TI

Hi,

The other day I taught you to use a voltage control switch as a model for the sample hold circuit at TINA-TI.

In this case, what should we do to achieve the droop rate of the sample and hold circuit?

Best regards,

  • 0
    TI__Guru 55466 points

    Hi user5994067,

    We do not have a model for the LF398.  However, if you build a simplified model of the sample-and-hold switch controlled with a voltage source, you may model the droop rate by applying a small DC leakage current source on the sample-and-hold capacitor.

    The leakage current into the hold capacitor is 30pA typ and 200pA max.  Applying in TINA a 30pA DC current source to drain the capacitor would be a rough model of the the droop rate of the sample-an-hold.  Below is a rough model using a 30pA leakage current.

    Thanks and Regards,

    Luis

    sample_and_hold_example.TSC